Builds workflow tools for the people he used to manage.
Marcus spent eight years as CTO at Celonis before going independent in 2020. Since then he's made 14 angel investments — almost all of them seed-stage B2B SaaS, almost all of them in companies solving "boring but painful" workflow problems for industries that still run on spreadsheets and email.
He looks for technical founders with operator instincts — people who've worked inside the industry they're now building software for. He writes the first or second check, brings 14 years of enterprise sales scars with him, and prefers to stay closely involved through the first 18 months.
Marcus is part of three angel syndicates across Munich, Berlin and Vienna. When he commits, he usually pulls in 3–6 others. He's currently active on the cap table of seven companies, with three already at Series A.
What Marcus actually backs.
Vertical SaaS for industries where the existing tools are old, expensive and hated. Healthcare workflows, construction back-office, talent and creative production, industrial process automation. Bonus points for AI that disappears into the workflow rather than sitting on top of it.
The companies he's backed.
A sample of Marcus's active portfolio — three exits and one IPO not shown.
What he's actually done so far.
Talk directly.
You haven't messaged Marcus yet. Start a thread — most founders open with a one-liner and one specific question.